@article{NAM_1912_4_12__30_0,
     author = {Delassus, Et.},
     title = {Sur l'extension de la notion de vitesse},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {30--37},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 12},
     year = {1912},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1912_4_12__30_0/}
}